Clock-actuated calendar



Nov. 18, 1930. E. SAHNER 1,782,274,

CLOCK ACTUATED CALENDAR Filed June 4, 1929 [urea/or:

Patented Nov. 18, 1930 UETED STATES EMIL SAHNER, OF SACKIN GEN, BADEN,GERMANY CLOCK-AGTUATED CALENDAR Application filed June 4, 1929, SerialNo. 368,255, and in Germany June 4, 1928.

Clock actuated calendars are known having an annual band or tape theguide rollers of which are released daily by the hand clockwork and,after a certain rotation corresponding to the moving on of the calendarband by one day, are again locked.

The invention relates to a releasing device for such clock actuatedcalendars and consists of a resilient locking lever, the point of whichengages in a hole of one of the guide rollers, said lever being raisedevery day from the roller by a release elem nt hingedly mounted in agroove of the 2 1 hour wheel and thereby releases this guide roller fora revolu tion to be effected by a separate clockwork mechanism. Afterbeing released the looking lever engages with a guide groove behind thereleasing element and jumps into the locking hole.

An embodiment of the invention is illustrated by way of example in theaccompanying drawing, in which Fig. 1 shows the calendar clockwork withpartly removed casing in front elevation,

Fig. 2 is a section on the line IIII of Fig. 1 with some parts removedby the section in dash-and-dotted lines.

Fig. 3 shows the releasing element in several positions.

An ordinary 36 hour clockwork is used. A

toothed wheel a is fixed on the shaft of the hour hand of the clock. Atooth wheel Z) of twice the diameter of the wheel a engages with thewheel a, so that the wheel I) only makes one revolution every 24 hours.

A resilient locking lever 0 having a clepression and a point at one endis loosely mounted on the shaft of the wheel I). A triangular catch (Zis pivotally mounted on the underside of the tooth wheel Z) and passesthrough the same. Every 24 hours the catch at passes under the lockinglever c and lifts the point of this lever out of a hole in the N roller6 The roller 6 has a reduced portion intermediate its ends. A small holeis provided on the left edge of the reduced portion with which the pointof the locking lever 0 engages. A groove extends from this hole onceround the roller to the other end of the reduced portion. An ordinaryspring motor 9 is arranged on a frame 7 adapted to be wound with a keyfrom the side of the clock. The tooth wheel h mounted on the springcasedrives a pinion i also mounted on the frame f. The axle of this pinion iL has a square opening in which the axle of the roller engages. Thetransmission of the rotary movement to the other rollers is effected inknown manner. The mechanism operates as follows: 611

The wheel 6 is meshed with the wheel a so that the releasing element cZ,when the hand reaches the position of 12 midnight, slides under thelocking lever 0 and disengages same from the roller 6 As soon as thepoint is clear of the hole in the roller 6 the locking lever is pulledto the right by a suitably ar ranged spiral spring m, and slides underits own spring force on the roller.

As soon as the disengagement has been ef- 79 fected the spring motor 9drives the pinion 2' and consequently winds the annual or calendar band.As soon as the locking lever 0 reaches. the groove in the roller 6 itfalls therein. As the roll is rotated to the rear in conjunction withthe roll 6 and the calender band the locking lever is led back to theleft by the groove whereby it tips forward and out of its path thereleasing element d and again engages in the hole at the end of 30 thegroove. The rollers become stationary after exactly one revolution andthe new date is visible through a glass window a. If the band is to moveat midday instead of at midnight, owing to the stopping of the clock,the clock is moved on 12 hours. If the clock has stopped for aconsiderable time the button p of the releasing element Z is depressedand the band is wound until the proper date is registered.

Wmt I claim, is:

A releasing device for a clock actuated calender, comprising incombination with an annular band driven by a spring motor, a guideroller over which said annular band passes having a helical grooveterminating in a hole, a resilient locking lever actuated by the clockand having a pointed end adapted to normally engage in said hole, awheel driven by the clock and having an aperture, 109

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a releasing element pivotally mounted on said Wheel and in said apertureand adapted to lift said locking lever every twenty-four hours from saidhole and a spiral spring adapted to pull said locking lever away fromsaid hole, whereby said spring motor isreleased to operate and the pointof said looking lever fails into said 'he lioal I groove of said guideroller to be guided back into the hole in said roller and to stop thesaid spring motor.

In testimony WhereofI have hereuntoset my hand. 7

EMIL S H B-

